Palladium-Catalyzed Decarboxylative C-H Alkynylation of Benzoxazoles with α,β-Ynoic Acids
作者:Jinsik Kim、Dongjin Kang、Eun Jeong Yoo、Phil Ho Lee
DOI:10.1002/ejoc.201301441
日期:2013.12
Palladium-catalyzeddecarboxylativeC–Halkynylation of benzoxazoles with α,β-ynoicacids was achieved for the first time. This straightforward method was found to be synthetically effective without strong base under air.
Convenient synthesis of 2-alkynylbenzazoles through Sonogashira cross-coupling reaction between thioethers and terminal alkynes
作者:Anca Paun、Mihaela Matache、Florina Enache、Ioana Nicolau、Codruta C. Paraschivescu、Petre Ionita、Irina Zarafu、Vasile I. Parvulescu、Gérald Guillaumet
DOI:10.1016/j.tetlet.2015.08.001
日期:2015.9
We describe herein the synthesis of 2-alkynylbenzoxazole and 2-alkynylbenzothiazole derivatives through the Sonogashira cross-coupling reaction of the corresponding thioethers and terminal alkynes under aerobic conditions, using CuI and Pd(dppf)Cl2 as catalysts. The synthetic methodology allows the convenient cross-coupling of heteroaromatic substrates with a wide variety of aromatic and aliphatic